Compress Scanned PDF Online Free

Reduce the file size of scanned PDFs significantly. Our image-optimized compression cuts scanned document sizes by up to 85% without affecting readability.

Upload your PDF to get started — no sign-up required.

Frequently Asked Questions

Why are scanned PDFs so large and how does this tool shrink them?

Scanned documents are essentially high-resolution images wrapped in a PDF shell. This tool applies specialized downsampling filters to shrink heavy image data layers while maintaining text readability.

Will this scanned optimizer work on low-contrast mobile document snapshots?

Yes. The engine uses optimization filters that sharpen characters and balance background contrast to keep your mobile snapshots legible at smaller file sizes.

Can I optimize multi-page document scans without running out of memory?

Yes. The system processes pages sequentially within local memory limits, allowing you to optimize long documents safely within your browser tab.

Is my personal data secure when optimizing scanned bank statements?

Completely. The data parsing scripts execute locally inside your browser sandbox. Your financial profiles remain entirely isolated from any remote access risk.

Will text search elements continue to function on scanned document pages?

This tool optimizes background graphic structures. If your scanned document hasn't been processed with text recognition, use our **OCR PDF** tool first to make text searchable.

Can I select an extreme compression profile for flat page scans?

Yes. You can toggle between balanced configurations to trade image quality for a smaller file size based on your needs.

Does this tool remove blank pages from my document scans automatically?

No. This tool optimizes file size properties. To drop unneeded sheets, process the file through our **Remove Pages from PDF** tool.

How large of a file footprint reduction can I expect on standard scans?

You can typically expect size reductions of up to 50% to 80% on image-heavy page scans as the tool optimizes large image layers efficiently.